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Deformation Behavior of Natural Wood Having Hierarchical Structure Under A Compression State

Published online by Cambridge University Press:  21 March 2011

Tsunehisa MIKI ,
Hiroyuki SUGIMOTO  and
Kozo KANAYAMA
Tsunehisa MIKI
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Anagahora 2266-98, Shimo-shidami, Moriyama-ku, Nagoya 463-8560, Japan.
Hiroyuki SUGIMOTO
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Anagahora 2266-98, Shimo-shidami, Moriyama-ku, Nagoya 463-8560, Japan.
Kozo KANAYAMA
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Anagahora 2266-98, Shimo-shidami, Moriyama-ku, Nagoya 463-8560, Japan.
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Abstract

A large deformation of bulk wood using slipping between the wood cells has been found just like a plastic deformation generated by slip band in metallic materials. This phenomenon is caused by the hierarchical structure of the wood cell, and the intercellular layer becomes selectively softened in moistened states of wood. In such conditions, bulk wood subject to compression at elevated temperatures can easily be deformed perpendicular to the longitudinal direction of the cells by shear flow stress after being collapsed.

Keywords

compositesuperplasticityhot pressing

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